from machine import Pin, PWM, ADC
from time import sleep

pwm = PWM(Pin(23),freq=50)
adc = ADC(Pin(35))
adc.width (ADC.WIDTH_9BIT)
adc.atten (ADC.ATTN_11BD)
dac = DAC(Pin(25))
push = Pin(14,Pin.IN,Pin.PULL_UP)

def valor (x):
    pwm.duty(x)
    dac.write(x)